It has been confirmed that some Japanese agricultural and fishery products are contaminated with radioactive cesium.

KBS recently purchased 20 assorted Japanese farm and fishery products across five locations in Tokyo, Ibaraki prefectures and Sapporo and commissioned a radiation research institute in Yokohama, Japan to examine them.

According to the test results, 27-point-76 becquerels of radioactive cesium were detected in each kilogram of mushrooms from Fukushima, 12-point-75 becquerels in dried persimmons and three-point-88 becquerels in halibut from Fukushima.

The figures is lower than South Korean and Japanese government's Derived Guidance Level, or radiation protection guideline, set at 100 becquerels. But the figure is higher than the South Korean Ministry of Food and Drug Safety's import regulations, which requires a proof of non-contamination of other radioactive substances for one becquerel detection.

A Japanese civic group on food safety said that about 500 becquerels of radioactive cesium were found in black porgy caught in Fukushima in May last year and rock fish caught in October 2013.

Meanwhile, radioactive cesium was not detected in the 20 types of fishery products that KBS purchased at five local fish markets in South Korea. The products included imports of Japanese and Russian pollack and domestic mackerel.